| Diagram of the dark box with a SiPM mounted on a temperature-controlled cold plate. V<sub>b</sub> is the bias voltage discussed below, V<sub>s</sub> is the preamplifier supply voltage set to 5 V in our work (recommended levels: 4 - 9 V)]]
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| Diagram of the dark box with a SiPM mounted on a temperature-controlled cold plate. V<sub>b</sub> is the bias voltage discussed below, V<sub>s</sub> is the preamplifier supply voltage set to 5 V in our work (recommended levels: 4 - 9 V)]] Note that the preamplifier electronics are mounted right on the cold plate extensions to minimize the length of the wires between the the SiPM and preamp input. Other arrangements caused significantly more pickup.